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Process Photos with digiKam’s Batch Queue Manager and a Bash Script

"Say, you want to keep a portfolio of selected photos on a
mobile device. Resizing multiple photos to a specified size to make
it easier to view them on the mobile device and transferring the
processed photos from digiKam to the mobile device manually is not
very practical. And this is where the ability to trigger scripts
via notifications can come in handy. You can attach a simple Bash
script to the Batch queue completed notification, so it's triggered
automatically when the Batch Queue Manager tool is done processing
photos."